What was found
FLT 1255, FLL-GYE. RETURNED TO FIELD. DIRTY SOCKS ODOR PRESENT DURING TAXI TO CLIMB. ODOR WAS NOTED THROUGHOUT CABIN & FLIGHT DECK. ODOR WAS LEAST PRESENT DURING CRUISE FLIGHT. SEE CABIN ODOR REPORT FORM; PERFORMED ENG IDLE RUN IAW 71-00-00. FAULT ISOLATED TO APU, TROUBLESHOT PER TSM 49-00-81-810-874-A. FOUND EVIDENCE OF OIL LEAK AROUND APU SHROUD SEAL & COMPRESSOR SECTION AS WELL AS THE EXHAUST. ALSO FOUND FUEL LEAKING FROM FUEL CONTROL ASSY. CLEANED AREA, PERFORMED ECS DECONTAMINATION IAW 21-00-00-615-004-A. COMPLIED WITH INFO NOTICE 2017-T015D SECTION C. A/C IS OK FOR SVC.